412 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th See. 



In the figure given, by Dr. Boulenger, of G. ocellatus, the scales under the 

 fourth toe are smaller toward the base ; in our species they are about equal 

 in size." 



Phyllodactylus tuberculosus Wiegmann. Tuberculated 



Gecko. 



Phyllodactylus tuberculosus, Cope, Proc. U. S. Nat. Mus., XII, 1889, p. 

 145 ; Garman, Bull. Essex Inst., XXIV, 1892, p. 81 ; Heller, Proc. Wash- 

 ington Acad. Sci., V, 1903, p. 60. 



Diagnosis. — Limbs with enlarged tubercles; back with very- 

 distinct rows of enlarged tubercles ; a median series of enlarged 

 subcaudals. 



Distribution. — In the Galapagos Archipelago, this gecko has 

 been found only on Chatham Island. 



Material. — Two specimens collected by the naturalists of the 

 Albatross, in 1887-88, are Nos. 14949 and 14956 in the U. S. 

 National Museum collection. Dr. Baur secured one specimen. 

 The Academy has twenty-one specimens collected by Mr. 

 Slevin. 



Description of No. 10848. — Head elongate ; snout depressed, rounded, 

 and rather narrow, a little more than one and a half times as long as 

 diameter of eye; ear-opening small with slight anterior denticulation of 

 small scales, slightly nearer than nostril to eye. Body and limbs moderate, 

 somewhat depressed, tail cylindro-conic. Snout covered with subequal, 

 smooth, convex granules. Hinder part of head, temples, back of neck, and 

 back and sides of body covered with smaller, smooth granules interspersed 

 with enlarged tubercles. These large tubercles are smooth and rounded on 

 the head, but trihedral and keeled on the neck and body. On each side of 

 the middorsal line, there are three or four rows of these large tubercles 

 on the neck and between the hind limbs, and from six to eight more or 

 less irregular rows near the middle of the body. The tubercles are not 

 close together in the rows. The small granules are flattened. Rostral 

 much broader than high. Nostril between rostral, first labial, and three 

 nasals, of which the upper is largest and meets its fellow of the opposite 

 side. Nine or ten upper, and eight or nine lower labials. Mental large, 

 a little longer than broad, bordered behind by two postmentals, which are 

 followed by polygonal shields which gradually pass into the small gulars. 

 Lower surface of body covered with smooth, imbricate scales, which change 

 gradually into the granular laterals and small gulars; about forty longi- 

 tudinal and seventy transverse series. Tail covered with stnall scales with 

 irregular, interrupted whorls of large, keeled tubercles ; an inferior median 

 series of broad plates. Limbs with enlarged tubercles ; digits slender, distal 

 pads large, truncate ; about fourteen lamellae under fourth toe. 



The color everywhere above is light yellowish gray with irregular spots 

 and bars of dark brown. The dark brown markings tend to form irregular 

 longitudinal bands on the head, and cross-bars on the body and tail. _ A 

 brown band runs from the nostril to the eye, and from the eye to the side 

 of the body, passing just above the ear-opening. Other bands run back 

 from the mouth and upper part of the eye. The transverse lines on the 

 body tend to form reticulations. There are thirteen dark bars on the tail. 

 The lower surfaces are yellowish white with minute slate dots. 



